This function allows the user to generate arcs. As illustrated in Figure 5.1.5, arcs can be generated using three approaches.
Figure 5.1.5 Create Arc dialog box
1. CENTER AND RADIUS
• Define a LCS. Refer to Section 2.5 , LOCAL COORDINATE SYSTEM, for information about defining LCS. The center of the arc will be positioned at the origin of LSC, and the arc will be in the UV plane of the LCS.
• Key in the values in the ARC PARAMETER dialog box as illustrated in Figure 5.1.6.
Figure 5.1.6 Arc Parameters dialog box
RAD: Radius of arc
TH1: Beginning angle from U-axis
TH2: Ending angle from U-axis
INC: Angle increment between points (default is 5 degree) on an arc
2. TANGENT TO 2 LINES
This function allows the user to create an arc that is tangent to 2 lines.
• Select two intersecting lines. Refer to Section 4.4.1, PART/ADD LINE, for more information about selecting lines.
• Enter the radius in the input field of RADIUS OF ARC dialog box as illustrated in Figure 5.1.7.
Figure 5.1.7 Radius of Arc dialog box
3. Create by THROUGH 3 PTS
This function allows the user to create an arc through three non-collinear points/nodes.
• Refer to section 5.1.1 and select three points/nodes in Figure 5.1.2. After the third point/node is selected, the arc and its center will be generated.